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  • Adhesives

Desmodur® 44 MC Fused

Desmodur® 44 MC Fused is a monomeric diphenylmethane-4,4'-diisocyanate (MDI).Desmodur® 44 M Flakes is a monomeric diisocyanate that is solid at room temperature and liquid above around 40 °C.

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About

Product Types

  • MMDI
  • Aromatic polyisocyanate
  • Isocyanate
  • Reactive system

Material

Adhesives
Solvent-free

General Characterization

Desmodur® 44 MC Fused is a monomeric diphenylmethane-4,4'-diisocyanate (MDI).
Desmodur® 44 MC Fused is a monomeric diisocyanate that is solid at room temperature and liquid above around 40 °C. It is suitable for combination with Baycoll®, Desmophen® and Acclaim® in the formulation of adhesives and polyurethane coating resins.

Storage Conditions

- Storage in original sealed Covestro container.

- Recommended storage temperature: < 5 °C.

- Protect from moisture, heat and foreign material.

General information: The product is sensitive to moisture. Like all isocyanates, it reacts with water to form insoluble urea derivatives and carbon dioxide. In closed containers, the formation of carbon dioxide can results in a dangerous build-up of pressure. Contact with air, especially coupled with exposure to light, accelerates the yellowing of the product. Generally speaking, the processing properties are not affected by yellowing. As a result of dimerization (formation of uretdione), the product is sensitive to heat. The solid product dimerizes more quickly at room temperature than the liquid product stored at 42 °C. Therefore, solid product should be stored at temperatures below 5 °C and melted quickly and carefully. Although dimerization declines with decreasing temperature, the storage stability is also limited at 5 °C. Handling instructions, safety data, information and proposals for melting units can be supplied on request.

Sampling

No data available

Packaging Type

No data available

Technical Properties & Datasheets

Property Name Test Method Unit Value
4,4'-MDI MDI-01-06 % min. 98.2
Hydrolysable chlorine MDI-01-04 mg/kg 50 ± 10
2,4'-MDI MDI-01-06 % max. 1.8

Property Name Test Method Unit Value
NCO content (theoretical) % by wt. 33.6
Vapor pressure at 20 °C hPa -5
Density at 40 °C DIN 51 757 g/cm3 approx. 1.19
Freezing point (2011-0260102-92) °C min. 38.4
Viscosity at 40 °C (2011-0313703-95) mPa*s 4.1
Phenyl isocyanate content (2011-0489801-95) ppm max. 10

Downloads

Technical Data Sheet
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Safety Data Sheet
No direct download available, please visit www.productsafetyfirst.covestro.com
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